Photocatalytic Ammonia Synthesis: Mechanistic Insights into N2 Activation at Oxygen Vacancies under Visible Light Excitation

ACS Catalysis ◽  
2021 ◽  
pp. 14058-14066
Author(s):  
Xianghong Niu ◽  
Anqi Shi ◽  
Dazhong Sun ◽  
Shanshan Xiao ◽  
Tingbo Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Oxygen Vacancies ◽  
Ammonia Synthesis ◽  
Light Excitation ◽  
N2 Activation

scholarly journals Elemental composition control of gold-titania nanocomposites by site-specific mineralization using artificial peptides and DNA

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Makoto Ozaki ◽  
Takahito Imai ◽  
Takaaki Tsuruoka ◽  
Shungo Sakashita ◽  
Kin-ya Tomizaki ◽  
...  
Keyword(s):  
Visible Light ◽  
Elemental Composition ◽  
Inorganic Compounds ◽  
Medical Science ◽  
Induction Effect ◽  
Site Specific ◽  
Composition Control ◽  
Light Excitation ◽  
Titania Photocatalyst ◽  
Scale Control

AbstractBiomineralization, the precipitation of various inorganic compounds in biological systems, can be regulated in terms of the size, morphology, and crystal structure of these compounds by biomolecules such as proteins and peptides. However, it is difficult to construct complex inorganic nanostructures because they precipitate randomly in solution. Here, we report that the elemental composition of inorganic nanocomposites can be controlled by site-specific mineralization by changing the number of two inorganic-precipitating peptides bound to DNA. With a focus on gold and titania, we constructed a gold-titania photocatalyst that responds to visible light excitation. Both microscale and macroscale observations revealed that the elemental composition of this gold-titania nanocomposite can be controlled in several ten nm by changing the DNA length and the number of peptide binding sites on the DNA. Furthermore, photocatalytic activity and cell death induction effect under visible light (>450 nm) irradiation of the manufactured gold-titania nanocomposite was higher than that of commercial gold-titania and titania. Thus, we have succeeded in forming titania precipitates on a DNA terminus and gold precipitates site-specifically on double-stranded DNA as intended. Such nanometer-scale control of biomineralization represent a powerful and efficient tool for use in nanotechnology, electronics, ecology, medical science, and biotechnology.

Ultrastable and Efficient Visible‐light‐driven CO2 Reduction Triggered by Regenerative Oxygen‐vacancies in Bi2O2CO3 Nanosheets

2021 ◽  
Author(s):  
Yongfu Sun ◽  
Xiaolong Zu ◽  
Yuan Zhao ◽  
Xiaodong Li ◽  
Runhua Chen ◽  
...  
Keyword(s):  
Visible Light ◽  
Oxygen Vacancies ◽  
Co2 Reduction ◽  
Visible Light Driven

Fabrication of indium gallium zinc oxide phototransistors via oxide-mesh insertion for visible light detection

2020 ◽  
Vol 8 (1) ◽  
pp. 165-172 ◽  
Author(s):  
Dongwoo Kim ◽  
Yeong-gyu Kim ◽  
Byung Ha Kang ◽  
Jin Hyeok Lee ◽  
Jusung Chung ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Visible Light ◽  
Oxygen Vacancies ◽  
Indium Gallium Zinc Oxide ◽  
Light Detection ◽  
Indium Gallium

Visible light detection of oxide phototransistors via insertion of an oxide-mesh inside the channel creating oxygen vacancies that increase subgap states.

Preparation of Visible-Light-Responsive TiO2-xNx Photocatalyst by a Very Simple Method

2011 ◽  
Vol 383-390 ◽  
pp. 3188-3191
Author(s):  
Han Jie Huang ◽  
Wen Long She ◽  
Ling Wen Yang ◽  
Hai Peng Huang
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Diffuse Reflection ◽  
Ammonia Solution ◽  
Reflection Spectra ◽  
X Ray Diffraction ◽  
Simple Method ◽  
X Ray ◽  
Light Excitation

A visible-light-responsive TiO2-xNx photocatalyst was prepared by a very simple method. Ammonia solution was used as nitrogen resource in this paper. The TiO2-xNx photocatalyst was characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), UV-Vis diffuse reflection spectra (DRS), and X-ray photoelectron spectroscopy (XPS). The ethylene was selected as a target pollutant under visible light excitation to evaluate the activity of this photocatalyst. The new prepared TiO2-xNx photocatalyst with strong photocatalytic activity under visible light irradiation was demonstrated in the experiment.

Effect of synergy between oxygen vacancies and graphene oxide on performance of TiO2 for photocatalytic NO removal under visible light

2021 ◽  
pp. 119362
Author(s):  
Chenyu Zhu ◽  
Guojun Li ◽  
Zheng Lian ◽  
Zhengwei Wan ◽  
Rui Huang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Oxygen Vacancies ◽  
No Removal

scholarly journals Photocatalytic Overall Water Splitting by SrTiO3 with Surface Oxygen Vacancies

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2572
Author(s):  
Yanfei Fan ◽  
Yan Liu ◽  
Hongyu Cui ◽  
Wen Wang ◽  
Qiaoyan Shang ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Oxygen Vacancies ◽  
Low Cost ◽  
Energy Levels ◽  
Light Response ◽  
Hydrogen Energy ◽  
Surface Oxygen ◽  
Carbon Reduction ◽  
Overall Water Splitting

Strontium Titanate has a typical perovskite structure with advantages of low cost and photochemical stability. However, the wide bandgap and rapid recombination of electrons and holes limited its application in photocatalysis. In this work, a SrTiO3 material with surface oxygen vacancies was synthesized via carbon reduction under a high temperature. It was successfully applied for photocatalytic overall water splitting to produce clean hydrogen energy under visible light irradiation without any sacrificial reagent for the first time. The photocatalytic overall water splitting ability of the as-prepared SrTiO3-C950 is attributed to the surface oxygen vacancies that can make suitable energy levels for visible light response, improving the separation and transfer efficiency of photogenerated carriers.

Near-infrared Luminescence from Ytterbium(III) Ternary Complexes by Visible-light Excitation of Attached Chlorophyll Derivatives

2009 ◽  
Vol 38 (7) ◽  
pp. 648-649 ◽  
Author(s):  
Qianming Wang ◽  
Shin-ichi Sasaki ◽  
Hitoshi Tamiaki
Keyword(s):  
Visible Light ◽  
Near Infrared ◽  
Ternary Complexes ◽  
Infrared Luminescence ◽  
Light Excitation ◽  
Chlorophyll Derivatives

Ultrathin two-dimensional BiOBrxI1-x solid solution with rich oxygen vacancies for enhanced visible-light-driven photoactivity in environmental remediation

2018 ◽  
Vol 236 ◽  
pp. 222-232 ◽  
Author(s):  
Qiao Wang ◽  
Zhiquan Liu ◽  
Dongmei Liu ◽  
Guoshuai Liu ◽  
Min Yang ◽  
...  
Keyword(s):  
Solid Solution ◽  
Visible Light ◽  
Environmental Remediation ◽  
Oxygen Vacancies ◽  
Two Dimensional ◽  
Visible Light Driven
Sign in / Sign up

Export Citation Format

Share Document